Episode list

Ryan, Seth, and Summer plot to get Marissa back into Harbor School.

Marissa's sister returns home from boarding school with secrets, lies, and a bag of stolen cash. Veronica and Julie compete for the affections of Niel Roberts. Johnny tries to distance himself from Marissa.

Julie throws Kaitlyn a birthday bash. Sandy tries to close a deal. Marissa butts heats with her sister. Seth spirals after being offered a college interview.

The Johnny-Kaitlin-Marissa-Ryan situation finds closure, perhaps, and tragedy for sure. Summer may be running out of forgiveness for Seth's half-truths. And Dr. Roberts makes a startling admission to Julie.

Kirsten and Julie throw a Valentine's Day party, as the community mourns the loss of Johnny.

Ryan and Sadie go on a road trip to look for Johnny's dad. A concerned Summer finds out about her dad's relationship with Julie. The police suspect foul play in Johnny's death. Marissa runs into Volchok.

The Cohens throw Ryan a party for his eighteenth birthday. Ryan can't decide whether or not to invite Marissa. Sandy tries to track down Dawn. Summer confronts Julie. Marissa crashes into an old memory.

Jess returns with news about Trey. Kirsten helps Ryan confront his savior complex. Seth and Summer receive sex counseling from Taylor.

Marissa's ties with Volchok send her into a substance abuse downward spiral. Summer is concerned about her friend--and the fate of her father's relationship if things don't improve. Ryan and Sadie's relationship is on the line, as Ryan and Marissa keep finding themselves intertwined in one another's lives. Seth spends some quality time with Kirsten, as she reaches nine months sober. The events at Newport Group turn violent.

College acceptance letters arrive. Three get in... and one doesn't.

Ryan heads to Albuquerque to invite his mom to graduation, while Summer tries to figure out why Seth broke up with her.

Ryan and Marissa arrive at Berkeley, and Summer and student/poseur Seth visit Brown for freshman orientation weekends. Familiar faces surface.

Harbor's Senior Prom brings out the best and the worst in everyone.

Sandy is voted Man of the Year. Kirsten hits the bottle. Summer tries to right an impulsive wrong. Ryan is blackmailed into stealing a car. Seth burns down his dad's office. Marissa gets Kaitlin out of trouble.

On graduation day, Marissa is leaving to be with her dad, but Volchok has feelings for her and is angry at Ryan.

During the last days of summer before college, Seth is working at a comic book store in Newport. Ryan has problems dealing with the issues of the past and pushes himself with his new job. Kirsten is preparing Ryan a "care package" but neither she nor Seth can persuade Ryan to come home since he moved out after Marissa's sudden death. At Brown University, Summer settles into her new dorm room with new friend Che, who's an activist who wants to rally the students for a protest. Taylor phones Summer from the Sorbonne in Paris to ask about her current living status.

Summer's roommate doesn't know about Seth. Ryan is out of town searching for someone important. There is a clothing drive at Harbor.

Thanksgiving! Julie and Neil have relationship issues, but she is unwilling to talk about it. Seth has a new friend. Julie is informed on the movements of Volchock.

Summer soul-searches during a visit from Seth. Taylor pleads for Ryan's help with her marriage. Sandy longs for a guys' night. Julie vows to turn over a new leaf in moving on from Marissa's Death.

Ryan can't sleep, and a smitten Taylor tries to seduce him by becoming his sleep therapist. Meanwhile, Seth vows not to call Summer, and Kaitlin struggles when Julie has a fling with her tennis instructor.

Summer gets kicked out Brown, thanks to her friend Che. Ryan has fantasies about Taylor after kissing each other. And Kaitlin throws a party at Dr. Roberts house to get even with a popular girl.

In a parallel universe, Sandy is married to Julie, Kirsten is Mrs. Jimmy Cooper, Summer is engaged to Ches, and Seth is in full geek mode. And Ryan and Taylor, stuck there after a fall, must change it.

Seth is clueless about what to do for New Year's Eve. Solution? Crash the Ryan-Taylor road trip to Vegas. Now add pregnancy tests, a space alien rave, thefts, misunderstandings, pursuits and a marriage proposal and it's time to welcome 2007!